Hi sorry for the long post.
A friend of mine has 3 lads all 3 can be quite agressive but one in particular who has asd. Ive advised her that because of how much energy he has to get him into a form of martial art as this will give him a positive and controlled way to burn off extra energy and his anger but recently he was olay fighting and he had a very very violent meltdown. He's very strong for his age and had to be restrained as there were young children around aswell my self and his aunt managed to get him to go upstairs eventually but this was after a good half hour if not more of pure rage and violence. We left him for about 10 mins and i went upstairs after a short chat (on my behalf as he's a selective mute) we agreed to go for a walk just him and myself to cool down he agreed and was very well behaved and calm when we got back he was pretty calm.
The reason for my post is mainly because i hope to see more of them and possibly babysit but as his mom has her handsful with the other 2 i'd like to be able to build a bond with him to help him calm down or atleast find otherways to channel his anger. I've looked into things like stress balls and rescue remedy which I'm goin to talk to him and his mom about but any advice from other people would be greatly appreciated as i can also use these in the future as i'd like to work with children with 'challenging behaviour'